Jimbob
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 posted on 26/7/07 at 05:14 PM |
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Failed SVA today
Well arrived at Beverly 8 sharp and a little wet!
1st thing checked was emissions, failed on lambda but co and hc were fine.
1DB up on the meter too but that was down to me un-balancing the carbs trying to pass emissions which the examiner agreed made it louder.
Everything else sailed through tho so cant grumble really!
Any ideas how i can improve the lambda reading??
James
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Wadders
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| posted on 26/7/07 at 05:16 PM |
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Not too bad a fail, bad luck
What emissions setup do you have on?
Al
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Jimbob
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| posted on 26/7/07 at 05:22 PM |
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quote:
Originally posted by Wadders
Not too bad a fail, bad luck
What emissions setup do you have on?
Al
Just balanced the carbs and a catalyst exhaust,
was hoping for the best!
Examiner said its very difficult to pass a test designed for EFI with carbs.
Dunno what im gonna do tho! Will chat to MK they have got cars thru
James
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Wadders
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| posted on 26/7/07 at 05:28 PM |
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Your going to need some sort of air bleed system, either expensive closed loop lambda or snoopys budget fishtank valve affair. The latter seems to do
the trick for next to nothing, so definately worth contactng MK for advice.
Good Luck
Al.
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Jimbob
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| posted on 26/7/07 at 05:34 PM |
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Yeah the examiner mentioned something about a fishtank valve thingy he had seen that seemed to work so il have a word with mk
Cheers Al
James
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GeoffB
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| posted on 26/7/07 at 05:53 PM |
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do a search for it theres a few posts about this
also try dodgy rogers site in the link pages hes got a couple of photos and explanation(its for a blade engine but the principle is there)
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DavidM
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| posted on 26/7/07 at 06:26 PM |
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quote:
Originally posted by Jimbob
Any ideas how i can improve the lambda reading??
James
Fit a crossflow!
Well done on a good fail.
David
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Andy W
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| posted on 26/7/07 at 06:54 PM |
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Hi James
At sva my lambda came in ok at 4k rpm, but this was to high for test, I managed to get through by holding it on the high side. Can you adjust your rev
counter to read about 1k rpm to low as they only went off this for revs.
Andy
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Jimbob
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| posted on 26/7/07 at 07:14 PM |
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quote:
Originally posted by Andy W
Hi James
At sva my lambda came in ok at 4k rpm, but this was to high for test, I managed to get through by holding it on the high side. Can you adjust your rev
counter to read about 1k rpm to low as they only went off this for revs.
Andy
Hi, they put there own rpm sensor on for emissions and noise and dont think my koso dash will let me do that, tends to read way out if its not set so
its a bit obvious cunning plan tho i like it!
James
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BenB
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| posted on 26/7/07 at 11:03 PM |
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Yes- usually they use their own connector to assess RPM for emissions but rely on your own for noise......
Hence having the tacho reading low might be useful for dB as long as they don't notice during the emissions test.........
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